For more than 20 years, public transit riders in Santiago, Chile have been able to borrow books from a network of mini-library vending machines in Metro stations. Now the service, which is provided by the municipal government and the Directorate of Libraries, Archives, and Museums, has added access to digital books for smartphones and tablets via new scanner stations. The Bibliometro project has also expanded to 23 borrowing points in public transit stations. What a great concept.